15 x^(2) +14x-49=0

Question

`15 x^(2) +14x-49=0`

Answer 1

`15x^2+14x-49=0\\\\ Terms:\\ a=15\ \ \ \ b=14\ \ \ \ c=-49\\ Quadratic\ Formula:\\\\ x=(-b\pm√(b^2-4ac))/(2a)\\\\ x=(-14\pm√(196+2,940))/(30)\\\\ x=(-14\pm√(3,136))/(30)\\\\ x=(-14\pm56)/(30)`


`Roots:\\\\ x'=(-14+56)/(30)\\\\ x'=(42)/(30)\\\\ x'=(21)/(15)\\\\ \boxed{x'=(7)/(5)}\\\\\\\\ x''=(-14-56)/(30)\\\\ x''=(-70)/(30)\\\\ \boxed{x''=(-7)/(3)}`

Answer 2

15x² + 14 - 49 = 0
x = -(14) +/- √((14)² - 4(15)(-49))
2(15)
x = -14 +/- √(196 + 2940)
30
x = -14 +/- √(3136)
30
x = -14 +/- 56
30
x = -14 + 56 x = -14 - 56
30 30
x = 42 x = -70
30 30
x = 1.4 x = 2.33...